/* Modern 2025 Design System - MattGPT Enhanced Research Platform */
:root {
    /* Primary Color Palette */
    --primary-50: #f0f9ff;
    --primary-100: #e0f2fe;
    --primary-200: #bae6fd;
    --primary-300: #7dd3fc;
    --primary-400: #38bdf8;
    --primary-500: #0ea5e9;
    --primary-600: #0284c7;
    --primary-700: #0369a1;
    --primary-800: #075985;
    --primary-900: #0c4a6e;
    
    /* Accent Colors */
    --accent-electric: #06b6d4;
    --accent-neon: #10b981;
    --accent-warning: #f59e0b;
    --accent-error: #ef4444;
    
    /* Neutral Palette */
    --neutral-0: #ffffff;
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;
    
    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-electric) 0%, var(--primary-600) 100%);
    --gradient-surface: linear-gradient(135deg, var(--neutral-50) 0%, var(--neutral-100) 100%);
    --gradient-dark: linear-gradient(135deg, var(--neutral-800) 0%, var(--neutral-900) 100%);
    
    /* Border Radius */
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, var(--neutral-900) 0%, var(--primary-900) 50%, var(--neutral-900) 100%);
    min-height: 100vh;
    color: var(--neutral-100);
    overflow-x: hidden;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(-10px) rotate(-1deg); }
}

.container {
    margin: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: 0px;
    overflow: hidden;
    border: 0px;
}

.header {
    background: var(--gradient-primary);
    color: var(--neutral-0);
    padding: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.header::after {
    content: '';
    width: 80px;
    height: 80px;
    background-image: url("MattGPT.png");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    flex-shrink: 0;
    filter: drop-shadow(0 0 20px rgba(6, 182, 212, 0.5));
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(6, 182, 212, 0.5)); }
    50% { filter: drop-shadow(0 0 30px rgba(6, 182, 212, 0.8)); }
}

.header-text {
    text-align: center;
    position: relative;
    z-index: 1;
}

.header h1 {
    font-size: 2.5em;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent-electric), var(--primary-400), var(--accent-neon));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.header p {
    font-size: 1.2em;
    opacity: 0.9;
    font-weight: 500;
}

.tab-nav {
    background: var(--gradient-surface);
    padding: 0;
    display: flex;
    overflow-x: auto;
}

.tab-button {
    flex: 1;
    padding: 20px;
    background: none;
    border: none;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--neutral-600);
    white-space: nowrap;
    min-width: 200px;
    position: relative;
    overflow: hidden;
}

.tab-button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.tab-button:hover::before {
    width: 300px;
    height: 300px;
}

.tab-button.active {
    background: var(--neutral-0);
    color: var(--primary-600);
    border-bottom: 3px solid var(--accent-electric);
}

.tab-button:hover {
    background: var(--neutral-100);
    color: var(--neutral-700);
    transform: translateY(-2px);
}

.tab-content {
    display: none;
    padding: 30px;
    min-height: 800px;
    background: var(--neutral-0);
    color: var(--neutral-700);
}

.tab-content.active {
    display: block;
}

.section {
    margin-bottom: 40px;
}

.expandable, .component-card {
    margin-bottom: 10px;
}

.section h2 {
    color: var(--primary-600);
    border-bottom: 3px solid var(--accent-electric);
    padding-bottom: 10px;
    margin-bottom: 20px;
    font-size: 1.8em;
    font-weight: 700;
}

.section h3 {
    color: var(--neutral-800);
    margin: 30px 0 15px;
    font-size: 1.3em;
    font-weight: 600;
}

.workflow-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 25px;
    margin: 20px 0;
}

.workflow-card {
    background: var(--gradient-surface);
    border-radius: 5px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-left: 5px solid var(--accent-electric);
    transition: transform var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.workflow-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.15);
}

.workflow-title {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--primary-600);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.workflow-description {
    color: var(--neutral-600);
    margin-bottom: 20px;
    line-height: 1.6;
}

.flow-diagram {
    background: var(--primary-50);
    border-radius: 5px;
    padding: 25px;
    margin: 20px 0;
    border-left: 5px solid var(--accent-electric);
    position: relative;
}

.workflow-step {
    background: var(--neutral-0);
    margin: 15px 0;
    padding: 20px;
    border-radius: 4px;
    border-left: 4px solid var(--primary-600);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    position: relative;
    transition: all var(--transition-normal);
}

.workflow-step:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.workflow-step::before {
    content: "→";
    position: absolute;
    left: -15px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-600);
    color: var(--neutral-0);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    box-shadow: 0 0 10px rgba(2, 132, 199, 0.3);
}

.workflow-step.start::before {
    content: "🚀";
    background: var(--accent-neon);
}

.workflow-step.decision::before {
    content: "?";
    background: var(--accent-warning);
}

.workflow-step.end::before {
    content: "✓";
    background: var(--accent-neon);
}

.step-title {
    font-weight: 600;
    color: var(--neutral-800);
    margin-bottom: 8px;
    font-size: 1.1em;
}

.step-description {
    color: var(--neutral-600);
    line-height: 1.6;
    margin-bottom: 8px;
}

.step-details {
    margin-top: 10px;
    font-size: 0.9em;
    color: var(--neutral-500);
    font-style: italic;
}

.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin: 20px 0;
}

.component-card {
    background: var(--neutral-0);
    border-radius: 5px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
    border-top: 5px solid var(--accent-electric);
    transition: transform var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.component-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.15);
}

.component-title {
    font-size: 1.3em;
    font-weight: 700;
    color: var(--primary-600);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.component-description {
    color: var(--neutral-600);
    margin-bottom: 20px;
    line-height: 1.6;
}

.methods-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.methods-list li {
    background: var(--primary-50);
    padding: 8px 12px;
    margin: 5px 0;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary-800);
    border-left: 3px solid var(--accent-electric);
}

.interactive-section {
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin: 20px 0;
    border: 2px solid var(--accent-electric);
}

.expandable {
    cursor: pointer;
    transition: all var(--transition-normal);
}

.expandable:hover {
    background: var(--primary-100);
}

.expandable-content {
    display: none;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--primary-200);
}

.expandable-content.show {
    display: block;
}

.chain-animation {
    background: var(--gradient-dark);
    border-radius: var(--radius-lg);
    padding: 30px;
    margin: 20px 0;
    position: relative;
    overflow: hidden;
}

.chain-step {
    display: flex;
    align-items: center;
    margin: 20px 0;
    opacity: 0.3;
    transition: all 1s ease;
    color: var(--neutral-300);
}

.chain-step.active {
    opacity: 1;
    color: var(--accent-electric);
    transform: scale(1.05);
}

.chain-step.completed {
    opacity: 0.8;
    color: var(--accent-neon);
}

.chain-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    margin-right: 20px;
    background: var(--neutral-700);
    transition: all 0.5s ease;
}

.chain-step.active .chain-icon {
    background: var(--accent-electric);
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.5);
    animation: pulse 2s ease-in-out infinite;
}

.chain-step.completed .chain-icon {
    background: var(--accent-neon);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.chain-content {
    flex: 1;
}

.chain-title {
    font-weight: 600;
    font-size: 1.2em;
    margin-bottom: 5px;
}

.chain-desc {
    font-size: 0.9em;
    opacity: 0.8;
}

.play-button {
    background: var(--gradient-accent);
    color: var(--neutral-0);
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin: 20px 0;
}

.play-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(6, 182, 212, 0.3);
}

.endpoint-box {
    background: var(--primary-50);
    border: 2px solid var(--accent-electric);
    border-radius: var(--radius-md);
    padding: 15px;
    margin: 10px 0;
    font-family: 'Courier New', monospace;
}

.method-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    font-weight: bold;
    margin-right: 10px;
}

.method-get {
    background: var(--accent-neon);
    color: var(--neutral-0);
}

.method-post {
    background: var(--accent-warning);
    color: var(--neutral-0);
}

code {
    background: var(--neutral-100);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: var(--primary-700);
}

/* Sun/Moon Icon Button - Minimalist */
.darkmode-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    color: var(--primary-700);
    border: none;
    border-radius: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1em;
    cursor: pointer;
    box-shadow: none;
    transition: transform var(--transition-fast), color var(--transition-fast);
    z-index: 10;
}

.darkmode-toggle:hover {
    transform: scale(1.25);
    color: var(--accent-electric);
}

/* Dark Mode Styles */
.dark-mode {
    background: linear-gradient(135deg, var(--neutral-0) 0%, var(--primary-100) 50%, var(--neutral-0) 100%);
    color: var(--neutral-900);
}

.dark-mode .header {
    background: var(--gradient-dark);
    color: var(--neutral-0);
}

.dark-mode .tab-nav {
    background: var(--gradient-dark);
}

.dark-mode .tab-button {
    color: var(--neutral-200);
}

.dark-mode .tab-button.active {
    background: var(--neutral-900);
    color: var(--accent-electric);
}

.dark-mode .tab-button:hover {
    background: var(--neutral-800);
    color: var(--accent-electric);
}

.dark-mode .tab-content {
    background: var(--neutral-900);
    color: var(--neutral-100);
}

.dark-mode .workflow-card,
.dark-mode .component-card {
    background: var(--neutral-800);
    color: var(--neutral-100);
}

.dark-mode .workflow-title,
.dark-mode .component-title {
    color: var(--accent-electric);
}

.dark-mode .workflow-step {
    background: var(--neutral-800);
    color: var(--neutral-100);
}

.dark-mode .workflow-step::before {
    background: var(--accent-electric);
    color: var(--neutral-900);
}

.dark-mode .step-title {
    color: var(--neutral-100);
}

.dark-mode .expandable:hover {
    background: var(--neutral-800);
}

.dark-mode .expandable-content {
    background: var(--neutral-900);
    color: var(--neutral-100);
    border-top: 1px solid var(--neutral-700);
}

.dark-mode .flow-diagram {
    background: var(--neutral-800);
    border-left: 5px solid var(--accent-electric);
}

.dark-mode .methods-list li {
    background: var(--neutral-700);
    color: var(--accent-electric);
}

.dark-mode .interactive-section {
    background: var(--neutral-800);
    color: var(--neutral-100);
    border-color: var(--accent-electric);
}

.dark-mode .endpoint-box {
    background: var(--neutral-800);
    color: var(--neutral-100);
    border-color: var(--accent-electric);
}

.dark-mode .endpoint-box strong,
.dark-mode .endpoint-box .method-badge {
    color: var(--accent-electric);
}

.dark-mode .endpoint-box div {
    color: var(--neutral-200) !important;
}

.dark-mode code {
    background: var(--neutral-700);
    color: var(--accent-electric);
}

.dark-mode .chain-step {
    color: var(--neutral-200);
}

.dark-mode .chain-step.active {
    color: var(--accent-electric);
}

.dark-mode .chain-step.completed {
    color: var(--accent-neon);
}

.dark-mode .chain-icon {
    background: var(--neutral-900);
}

.dark-mode .chain-step.active .chain-icon {
    background: var(--accent-electric);
}

.dark-mode .chain-step.completed .chain-icon {
    background: var(--accent-neon);
}

.dark-mode .play-button {
    background: var(--gradient-primary);
    color: var(--neutral-0);
}

.dark-mode .darkmode-toggle {
    color: var(--accent-electric);
}

.dark-mode .workflow-description,
.dark-mode .component-description,
.dark-mode .step-description,
.dark-mode .step-details,
.dark-mode .chain-desc {
    color: var(--neutral-200);
}

.dark-mode .section h2,
.dark-mode .section h3,
.dark-mode .workflow-title,
.dark-mode .component-title,
.dark-mode .step-title {
    color: var(--accent-electric);
}

.dark-mode .audio-player-container {
    background: var(--neutral-800) !important;
    border-color: var(--neutral-600) !important;
}

.dark-mode [id^="player-"] {
    background: var(--neutral-800) !important;
    border-color: var(--neutral-600) !important;
}

.dark-mode audio {
    filter: invert(1) hue-rotate(180deg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        margin: 0px;
        border-radius: 0px;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .tab-nav {
        flex-direction: column;
    }
    
    .tab-button {
        min-width: unset;
    }
    
    .workflow-grid,
    .architecture-grid {
        grid-template-columns: 1fr;
    }
    /* ===================================================================== */
    /* PODCAST PLAYER STYLES - Add this to your existing styles.css file */
    /* ===================================================================== */

    /* Podcast Controls */
    .podcast-controls {
        display: flex;
        gap: 10px;
        margin-top: 15px;
        align-items: center;
    }

    .podcast-listen-btn, .podcast-download-btn {
        background: var(--primary-600);
        color: var(--neutral-0);
        border: none;
        padding: 8px 16px;
        border-radius: var(--radius-md);
        font-size: 0.9em;
        font-weight: 500;
        cursor: pointer;
        transition: all var(--transition-fast);
        text-decoration: none;
        display: flex;
        align-items: center;
        justify-content: center;
        width: 120px;
        box-sizing: border-box;
        min-height: 36px;
    }

    .podcast-listen-btn:hover, .podcast-download-btn:hover {
        background: var(--primary-700);
        transform: translateY(-1px);
    }

    .podcast-listen-btn:disabled {
        opacity: 0.6;
        cursor: not-allowed;
        transform: none;
    }

    /* Audio Player Container */
    .podcast-player {
        margin-top: 10px;
        padding: 15px;
        background: var(--neutral-50);
        border-radius: var(--radius-md);
        border: 1px solid var(--neutral-200);
        transition: all var(--transition-normal);
    }

    .podcast-player audio {
        width: 100%;
        max-width: 100%;
        height: 40px;
        outline: none;
    }

    /* Enhanced audio controls styling */
    .podcast-player audio::-webkit-media-controls-panel {
        background-color: var(--neutral-0);
        border-radius: var(--radius-md);
    }

    .podcast-player audio::-webkit-media-controls-play-button,
    .podcast-player audio::-webkit-media-controls-pause-button {
        background-color: var(--primary-600);
        border-radius: 50%;
    }

    .podcast-player audio::-webkit-media-controls-timeline {
        background-color: var(--neutral-200);
        border-radius: 25px;
        margin-left: 10px;
        margin-right: 10px;
    }

    .podcast-player audio::-webkit-media-controls-current-time-display,
    .podcast-player audio::-webkit-media-controls-time-remaining-display {
        color: var(--neutral-600);
        font-size: 0.85em;
    }

    /* Dark mode overrides for podcast components */
    .dark-mode .podcast-listen-btn {
        background: var(--accent-electric);
        color: var(--neutral-0);
    }

    .dark-mode .podcast-listen-btn:hover {
        background: var(--primary-700);
    }

    .dark-mode .podcast-download-btn {
        background: var(--primary-700);
    }

    .dark-mode .podcast-download-btn:hover {
        background: var(--primary-600);
    }

    .dark-mode .podcast-player {
        background: var(--neutral-800) !important;
        border-color: var(--neutral-600) !important;
    }

    .dark-mode .podcast-player audio::-webkit-media-controls-panel {
        background-color: var(--neutral-700);
    }

    .dark-mode .podcast-player audio::-webkit-media-controls-play-button,
    .dark-mode .podcast-player audio::-webkit-media-controls-pause-button {
        background-color: var(--accent-electric);
    }

    .dark-mode .podcast-player audio::-webkit-media-controls-timeline {
        background-color: var(--neutral-600);
    }

    .dark-mode .podcast-player audio::-webkit-media-controls-current-time-display,
    .dark-mode .podcast-player audio::-webkit-media-controls-time-remaining-display {
        color: var(--neutral-200);
    }

    /* Loading state for podcast buttons */
    .podcast-listen-btn.loading {
        position: relative;
        color: transparent;
    }

    .podcast-listen-btn.loading::after {
        content: '';
        position: absolute;
        width: 16px;
        height: 16px;
        top: 50%;
        left: 50%;
        margin-left: -8px;
        margin-top: -8px;
        border: 2px solid var(--neutral-0);
        border-radius: 50%;
        border-top-color: transparent;
        animation: button-spin 1s linear infinite;
    }

    @keyframes button-spin {
        to {
            transform: rotate(360deg);
        }
    }

    /* Responsive adjustments for podcast controls */
    @media (max-width: 768px) {
        .podcast-controls {
            flex-direction: column;
            gap: 8px;
        }

        .podcast-listen-btn, .podcast-download-btn {
            width: 100%;
            max-width: 200px;
        }
    }

    /* Enhanced hover effects for podcast items */
    .podcast-item {
        transition: all var(--transition-normal);
    }

    .podcast-item:hover .podcast-listen-btn {
        background: var(--accent-electric);
        transform: translateY(-1px);
    }

    .podcast-item:hover .podcast-download-btn {
        background: var(--accent-neon);
        transform: translateY(-1px);
    }

    /* Animation for showing/hiding audio player */
    .podcast-player {
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        transition: all 0.3s ease-in-out;
    }

    .podcast-player[style*="display: block"] {
        opacity: 1;
        max-height: 200px;
        margin-top: 15px;
    }

    /* Focus states for accessibility */
    .podcast-listen-btn:focus,
    .podcast-download-btn:focus {
        outline: 2px solid var(--accent-electric);
        outline-offset: 2px;
    }

    .podcast-player audio:focus {
        outline: 2px solid var(--accent-electric);
        outline-offset: 2px;
    }

    /* Error state styling */
    .podcast-listen-btn.error {
        background: var(--accent-error);
        color: var(--neutral-0);
    }

    .podcast-listen-btn.error:hover {
        background: #dc2626;
    }
}